Bossil High Temp RED is the original gasket maker formulated for high temperature and heavy duty applications. It makes reliable FORMED IN PLACE gaskets that resists cracking, shrinking and migration caused by thermal cycling. It is ideal to replace almost any cut gasket. It also can be used to coat pre cut gaskets to increase reliability. It is permanentaly flexible up to temperature of 343 degree C and is also highly resistant to various auto shop fluids.